Went to a lecture by Phil Borges a few weeks back. He uses an Instax camera to "break the ice" wherever he travels.
Phil comes into a community, takes pictures of the kids with the Instax, gives the pictures to the kids, the kids show their parents, the parents want their own, & Phil gets to take the pictures he really wants. His camera broke on one trip and he said it crippled his ability to work big time.
My daughter is going to China on a summer college program and will be using a Polariod 210 to do something similar, she'll shoot one to give and one to keep on her travels. The keeper is being pasted into a journal then she'll add text. Imagine her being able to show her kids that book and tell her story.